fix application helper
add omniauth gems
add 'name' and 'picture' columns to users table
Allow devise to save user's name on signup
add 'authentication' migration, model, controller and specs
update schema
add 'Authentication' factory
configure omniauth to allow login with facebook
update 'user' model specs
update views to display login with facebook option
update navbar to display users's name
Merge with master
update schema
add presence validation for user name
update user factory
modify navbar to comply with feature tests
add user name to the feature helper
Faraday::Error::ConnectionFailed error fixed on some machines
fix omniauth authentication
Merge branch 'login-with-facebook' of https://github.com/purple-martins-2013/live-together into login-with-facebook